<template>
    <!-- 把两个事件函数分开 -->
  <!-- <li  :class="isEnter?'active':''"
  @mouseenter="mouseEnterHandle"
  @mouseleave="mouseLeaveHandle"
  > -->

  <!-- 两个事件逻辑一致,可以使用一个事件函数 -->
  <li :class="isEnter?'active':''"
  @mouseenter="mouseChangeHandle('enter')"
  @mouseleave="mouseChangeHandle('leave')"
  @click="singleCheckHandle(id)"
  >
    <label>
      <input type="checkbox" :checked='done'/>
      <span>{{thing}}</span>
    </label>
    <button class="btn btn-danger"  @click="singlDeleteHandle(id)">删除</button>
  </li>
</template>

<script>
export default {
  name: "Item",
  props:['thing','done','id','singleCheckHandle','singlDeleteHandle'],
  data(){
    return {
        isEnter:false
    }
  },
  methods:{
    mouseEnterHandle(){
        this.isEnter=true
    },
    mouseLeaveHandle(){
        this.isEnter=false
    },
    //鼠标的两个事件函数合并在一起
    mouseChangeHandle(type){
        // this.isEnter=type==='enter'?true:false
        this.isEnter = type==='enter'
    }
  }
};
</script>

<style scoped>
/*item*/
li {
  list-style: none;
  height: 36px;
  line-height: 36px;
  padding: 0 5px;
  border-bottom: 1px solid #ddd;
}

li label {
  float: left;
  cursor: pointer;
}

li label li input {
  vertical-align: middle;
  margin-right: 6px;
  position: relative;
  top: -1px;
}

li button {
  float: right;
  display: none;
  margin-top: 3px;
}

li:before {
  content: initial;
}

li:last-child {
  border-bottom: none;
}

li.active{
    background-color: #ccc;
}

li.active button{
    display:block;
}
</style>